Process for welding metals.



No. 8%,084. PATENTED DEG. l7, 1907. F. JGZTRAND & F. SCHMIDT. 3., a. JDTKFBAHD, wznow or r. mums, nnomarm, AND A. JOTTRAND, ASSOCIATE GUARDIAN or THE HEIRS-AT-LAW.

PROCESS FOR WELDING METALS.

APPLICATION FILED JUL-I23, 1903.

UNITED STATES PATENT OFFICE.

FELIX JOTTRAND, OF UCGLE, NEAR BRUSSELS, AND FREDERICK SCHMIDT, OF N AMUR, BELGIUM; JULIA RENARD JOTTRAND, WIDOW OF FELIX JOTTRAND, DECEASED, AND AUGUSTE JOTTRAND, ASSOCIATE GUARDIAN OF THE HEIRS-AT-LAW, ASSIGNORS OF ALL OF THEIR RIGHTS TO SOCIETE ANONY ME LOXHYDRIQUE INTERNATIONALE, A

CORPORATIQN OF BELGIUM.

PROCESS FOR WELDING METALS.

Specification of Letters Patent.

Patented Dec. 17, 1907.

To all whom itmoy concern:

Be it known that FELIX JOTTRAND, a subject of the King-of Belgium, residing at Uccle, near Brussels, and FREDERICK SCHMIDT,

a subject of the Emperor of Germany, residin i at 10 Boulevard du Nord, Namur, in the Kingdom of Belgium, en ineers, have invented certain new and use 111 Improvements in Processes for Welding Metals, of which the following is a specification.

This invention has reference to the art of welding metals, and particularly relates to that branch of the art wherein is employed a flame of an oxyhydrogen blow-pipe, or of an electric are, or of any other source of heat, for welding the metals together without the use of any material other than that afforded by the pieces to be joined. In this particular branch of the art, the invention has special reference to the welding of metallic pieces of different thicknesses and may be employed, for instance, in the manufacture of ipes provided with flanges, or in the manu acture of metallic casks or the like.

Hitherto when it was desired to weld together two metallic pieces of different thicknesses, the following inconvenience was experienced: When the blowipe, or other eating apparatus, was use to bring the pieces to welding temperature, the thinner piece was raised to said temperature sooner than the thicker one, with the result that the thinner piece was fused and burnt before the thickerpiece actually became red-hot. Therefore, it wasfound to be practically impossible, without great loss of valuable materials, or the loss of valuable time and labor, to weld together two pieces of very different thickness.

Therefore, this invention has for its ob jects to avoid the above inconvenience, prevent the loss of materials, and to allow the welding of'two pieces of different thickness with the same facility as when it is desired to unite or fuse together two pieces of the same, for nearly the same, thickness. In order that my process ma be readily understood, the same will be i ustrated .in

in whicliii;

Fi urqil shows in section two pieces of maconnection with the accompanying drawings,

together to provide a improved process, showing the manner of uniting to ether a sheet of metal and a metallic bloc or, generally 5 aking, the manner of joining a thin metal ic piece to a thick piece of metal; Fig. 2 is a similar view and shows the application of the rocess to the manufacture of pipes provide with flanges; and Fig. 3 shows the application of the process to the manufacture of metallic casks.

Referring to Fig. 1, if it is desired to weld a thin piece, such as a sheet h for example, to a thick piece '5, the said iece i, would ordinaril require heating a muc longer time, before 1t would be raised to the point of fusion, than the thin piece h, and when operati according to the ordinary processes, the t 'n piece would be burned or fused before the thick piece 11 became sufficiently hot. According to this invention, a notch or groove Ir is formed or cut in the thick piece 1', near one edge and at the side which is to be welded, so as to form a lip I having substantially the same thickness as the thin piece h. The extremity m of the thin piece or sheet h is then placed a ainst the said side of piece 1' and substantially flush with lip l, and the said two parts are then fused together.

W on the process is to be applied to the manufacture of ipes provided with flanges p (Fig. 2) it ma e carried out in a quite simi- Par manner, t e flange p being first provided with a notch k so as to form, at the center of the flange, an annular portion or lip l, similar to the lip l, and having substantially the same thickness as the material of the pipe 0, and the parts being placed together as shown in Fi 2 and thus adgpted to be easily fused ange on the en of the pipe. V

Fig. 3 shows the same process applied when it is desired to provide metallic casks such as r with hoops u.

From the above description, it will be seen that the process of this invention 'comprebonds the following general step: The thickness of the thicker piece is first reduced, at

the part to be welded, to the same thickness or nearly the same thickness of the. thinner piece; the two pieces are then placed together, or arranged in juxtaposition, so that the reduced portion of the" tluck piece will cooperate with the thin piece; then a flame is troubles hereto applied to the two pieces at the point where t e thickness thereof isthe same, the fusion taking place only at the part where the thickness has been reduced. Hence, in carrying the invention into practice the thickness of the thicker piece is reduced to the thickness of, or to nearly the same thickness as, the thinner piece by forming in the thicker piece a notch or groove or by providing the thicker piece with a part having substan-i tially the same thickness as the thinner piece, so as to form a lip against which the extremity of the thin piece is placed. It suflices then to apply heat to the junction of the two.

pieces in order to fuse the metal equally and As will be obvious from effect a tight joint. the above description, according to our improved process, it is possible to weld, or unite together, two pieces of very different thickness without ex eriencing the difliculties and f bre resulting, in the ordinary process, from the fusion of the thinner piece before the thicker onehas been raised to the welding temperature.

What we claim is:

'The process for uniting two pieces of metal of different thicknesses comprising the following steps: first forming in the thicker 'p having substantiall the same thickness as the thinnerpiece, p acin the two pieces together so that the parts 0 uniform thickness will cooperate and then applying a source of heat at the point of cooperation of the parts of uniform thickness whereby said parts will heat and fuse uniformly and become properly welded together.-

In witness whereof we have hereunto set our hand in presence of two witnesses.

, FELDC JOTTRAND.

FREDERICK SCHMIDT. Witnesses:

MAURICE GERBEAULT, GEOBG BETLE.

iece a notch or groove, thereby producing a 

